This quest unlocks a few others and is super easy. Just go into The Hanged Man during the day and talk to Varric about finding Deep Roads maps. This will unlock the Tranquility quest, unlock the Rumor section of the Journal and give you a friendship boost with Varric.

When you're done talking to Varric head south from his room. Loot the chest you come to and it will unlock the Shawl of Dalesdottir quest.